When entering a road that has two lanes one should drive in the left lane, and if a sign ahead states < FORM ONE LANE > we should remain driving in the left lane allowing room for a car to overtake on the right if they want to. As the road ahead narrows to one lane some times a sign warns you this is taking place, however in many places it does not so one must be vigilant at all times.
There is a lot of confusion when merging. The old rule was to give way to the right even if the car on the right was a little behind us. That rule changed over 10 years ago but many people are still unaware.
Many people noticeably, do not understand what is required when approaching a Roundabout. For example many do not indicate at all, or indicate incorrectly. When exiting to the left approach cautiously, your speed ideally should be around 20 KPH if obstructions like trees, shrubs or a fence is evident.
Driving in wet weather can be hazarded because of limited visibility and depending on whether it is just drizzling, raining very hard or blowing a gale.